Rapid Seismic Rehabilitation Strategy: Concept and Testing of Cable Bracing with Couples Resisting Damper
Publication: Journal of Structural Engineering
Volume 138, Issue 3
Abstract
The goal of this study is to design and evaluate simple and rapid seismic retrofit devices for relatively small rehabilitation projects for steel structures. These designs are consistent with the tenets of sustainable design and will result in a more resilient building stock as well as minimizing environmental and economical effects and social consequences during the rehabilitation project. To achieve these goals, a unique approach to designing supplemental systems by using tension-only elements is proposed, one that eliminates undesirable global and local buckling. The first generation of these devices, a bracing system consisting of cables and a central energy dissipating device [couples resisting (CORE) damper], is presented in this paper. Both analytical studies with advanced and simplified models and proof-of-concept testing demonstrated stable, highly efficient performance of the system under seismic loads. Preliminary applications of the CORE damper system to the retrofitting of a braced steel frame showed the ability of the system to minimize soft story failures and residual deformations.
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Acknowledgments
The authors would like to thank Matthew Speicher, Mike Sorenson, and Andy Udell in Georgia Institute of Technology for their assistance in consulting and constructing the test bed and specimens.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 138 • Issue 3 • March 2012
Pages: 354 - 362
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Feb 1, 2010
Accepted: Feb 16, 2011
Published online: Feb 18, 2011
Published in print: Mar 1, 2012
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